Tool-guide.



No. 859,955 PATEHTED JULY 16, 1907.

H. P. LIBBY.

I TOOL GUIDE. APPLICATION FILED SEPT. 7.1906.

- Inventor.-

witnesses y mtg S.

HENRY FORREST LIBBY, OF BOSTON, MASSACHUSETTS.

TOOL-GUIDE.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed September 7. 1906. Serial No 333,650.

To all whom "it may concern:

-Be it known that I, HENRY FORREST LIBBY, a

citiz en of the United States, residing at Boston, in the county ofSuffolk,: State of Massachusetts, have in vented an ImprovementinTool-Guides, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

This invention relates to tool guides and particularly to guides forhole forming or hole boring tools.

Having reference to that type or embodiment of my invention hereinpresented for illustration, in the drawings,

Figure l is a side elevation of one type of tool guide representing thesame in guiding relation in full lines and in a non-guiding relation indotted lines, and showing a tool positioned therein, certain parts beingbroken away to show more clearly the interior construction; and, Fig. 2is a plan view of that form of tool guide represented in Fig. 1.

Having reference to that type of the invention here chosen'forillustration, the base Whereon the tool guide is preferably mounted, isshown at 1, the same being of any material but preferably of wood andshown as broken away between its ends. The said base may be of anydesired extent, but as herein shown and preferably it is such that itmay be readily applied to the work and firmly held thereagainst bysuitable pressure, as by the hand or knee of the user, or clampedthereto, if desired. While a tool guide constructed in accordance withmy invention may be adapted for use in connection with tools of varioussorts, it is more particularly intended for use in connection with holeforming, and specifically speaking, hole boring tools, applicable towork in metallic or-non-metallic materials, in the present instancebeing shown in connection with a bit 2, having a suitable handle 3. Inthe use of hole forming or hole boring tools, it is requisite that theholes shall be bored straight or true and usually normal to the plane ofthe surface of the work. It is apparent, however, that if it be desiredto force or form an inclined hole that the base may be suitably securedor positioned at the proper angle to the work, so that the tool may bepresented thereto at the correct inclination. In cer tain branches ofcarpentry, as, for example, in providing holes for dowel pins, it issometimes necessary to provide a plurality of spaced holes, and in suchcase it is quite essential that such holes be truly parallel. A toolguide having a support such as shown, may be readily applied to the workin any position, as, for example, horizontally, in which case the properpressure may be readily applied with the knee of the user, or, in avertical position, as, for example, to the edge of a door or the like.The said base is herein shown as having an enlarged opening 4, at orsurrounding the point of work penetration of the tool, so that clearanceis afforded for shavings or the like resulting from the work.

In order to provide a firm support for the tool, to prevent bending ofthe latter, and in order truly and accurately to guide the tool to thework, it is preferable to provide guiding .means for the tool close tothe work.- Although in certain aspects of my invention the guide may belocated at a distance from the work, yet*I find it particularlyadvantageous forthe reasons enumerated and for other obvious reasons, toguide the tool close to the work and in the case of a threaded tool todirectly guide a part or all of the threaded portion. A guide positionedadjacent the threaded portion of the tool may, under certain conditions,guide, and, if desired, directly engage the threaded portion 5,throughout the entire circumference thereof; it is in the present typeof the inven tion preferable so to form the guide that it may, ifdesired, engage the threaded portion at a plurality of circumferentiallyspaced points, in order to give the proper freedom of operation of thetool. Whether or not the guide directly engages the threaded or outerpart of the tool, depends, in the present type of the invention, uponthe adjustment of the guide. It may in certain instances be sufficientif the guide be adjacent the tool without actual contact at one or aplurality of points. While the guide may be of any suitable constructionand be adapted to guide or to engage either the threaded or non-threadedportion of the tool, I preferably form the same as an expansible guide,in order to adapt it for use with tools of different diameters, and inorder the more readily to insert the tool in the guide or to fit theguide properly to the tool. While an expansible tool guide may be formedin a variety of ways, I have in the present type of the inventionselected for illustration an expansible, tool guide composed of aplurality of parts adapted more or less completely to surround orencompass the tool, such parts being relatively movable,

so that the tool and the guide may be brought into proper relation.

Referring now specifically to the type of expansible guide selected forillustration, the stationary member thereof is represented at 6, itbeing preferably of with the said base 1. The said fixed member 6, of

the guide, is herein shown as having two diverging wings 8, which arepreferably disposed at right angles to each other and adapted, ifdesired, to contact with the tool and herein with the threaded portionthereof at preferably two circumferentially spaced points 9 and 10. Thesaid wings may be of any desired longitudinal extent, so as to guide,and, if desired, directly engage any desired portion of the tool and inthe present instance may engage substantially the entire threadedportion thereof prior to its entrance into the work or such partsthereof as may be desired. It is apparent that While each wing of thefixed member is shown as continuous, a plurality of preferably axiallyalined wings may be employed in substitution for each wing of the pairto suitably guide the tool. The fixed member of the guide may beconstructed otherwise than as described, so as to suitably guide orposition, and, if desired, contact with the tool.

It is desirable in many instances to gage or regulate the depth of workpenetration of the tool. I have, therefore, in this type of theinvention provided a gage to regulate the work penetration of the tool,and while the same may be constructed in any desired manner, I haveherein shown the same as mounted upon the fixed member of the guide andas adjustable therein, the horizontally disposed gage 1]., which, asherein shown, is adapted to receive the lower portion of the handle 3when the proper depth has been secured, having a spindle 12, preferablyprovided with graduating marks and received within a vertically disposedsocket 13, wherein it may be secured at the proper point by any securingmeans, such, for example, as the wing nut 14.

In the type of expansible guide herein chosen for illustration, I mayemploy one, or, if desired, a plurality of movable guiding members. Inthe present instance I have shown a single movable member 15, having aflanged lower member or base 16, preferably having a longitudinal slot16 therein, and adapted to be adjustably secured as by a wing nut 17,passing through said slot and engaging the extended flanged portion 7,of the fixed member of the guide, or the base portion 1. Said flangemembers 7 and 16 may have a suitable dovetailed connection, as indicatedat 17" While the movable member of the guide may have any suitable toolguiding provision, I herein have shown the same as provided with wings18, corresponding in number and reversely disposed with respect to thewings of the fixed member of the guide. In the present instance saidwings are shown as disposed at substantially right angles to each otherand as contacting with the threaded portion of the tool at two points 19and 20. It is apparent that the tool guide may if desired, contact withthe tool, whether at the threaded portion or elsewhere, at more than thepoints shown, and that the guiding, and if desired, contacting portionsmay be of such area or conformation as is desired. In the presentinstance the wings of one of the members and herein the movable member,are shown as of less vertical extent than the wings of the fixed member,and as interengaging there with, each of the wings'of the fixed memberbeing for this purpose cut away at one or more points for a suitableportion of their vertical extent to receive the corresponding wings ofthe opposing member. This construction affords a wing having an extendedbearing surface and a tool of any desired diameter may be readilyemployed therewith.

Having thus disclosed one type or embodiment of my invention, I wish itto be clearly understood that although I have described the samespecifically, yet the descriptive terms are not used as limiting terms,

but in their generic sense, and that the scope of the invention is setforth in the following claims.

Claim.

1. A guide for a boring tool comprising a plurality of upright guidingmembers adapted to receive and embrace between them the boring member ofthe tool thereby sustaining the same close to the work, said tool beingthereby guided to its work, each member having a base portion disposedsubstantially normal to the guiding portion of the member, said baseportions being superimposed one upon the other, the lower one of saidbase portions being supported at a plurality of points disposedlongitudinally thereof at opposite sides of the tool whereby the toolmay be guided to its work and the guide may be readily supported againstthe work without clamping and means to secure said"base portions inproper relation.

2. A guide for a boring tool comprising a support having a passage forthe boring tool, said support being adapted to be applied to the work, aplurality of base members mounted flatwise upon the upper face of saidsupport and within the contour thereof, tool guiding members rising fromsaid base member and adapted to receive and embrace between them theboring member of the tool thereby to support the same close to the workand to direct it to the passage in the support, one of said membershaving its base portion movably mounted, whereby its tool guiding membermay be moved toward and from the other member to accommodate differentsizes of boring tools and means to secure said base portions in properrelation.

3. A guide for a boring tool comprising a plurality of upright guidingmembers adapted to receive and embrace the boring member of the toolbetween them thereby supporting the same in proximity to the work, eachmember having a base portion disposed substantially normal to theguiding portion of the member, said base portions being superimposed oneupon the other and one of said base portions having a sliding movementrelative to the other, that one of said base portions that is fixed tothe support being supported at a plurality of points disposedlongitudinally thereof at opposite sides of the tool, whereby the toolmay be guided to its work and the guide may be readily supported againstthe work without clamping and means to secure said base portions inproper relation.

4. A guide for a boring tool comprising a plurality of upright guidingmembers adapted to receive and embrace the boring portion of the toolbetween them, the tool being thereby guided to its Work and supportedadjacent thereto, each of said members having a base portion disposedsubstantially normal to the guiding portion of the member, the guidingportions of the members being located entirely above the base portionsthereof whereby a flat lower face is presented directly beneath saidbase portions so that the device may be applied flatwise to its work andmeans to secure said base portions in proper relation.

5. A guide for a boring tool comprising a plurality of upright guidingmembers adapted receive and embrace the boring portion of the toolbetween them, the tool being thereby guided to its work and supportedadjacent thereto, each of said members having a base portion disposedsubstantially normal to the guiding portion of the member, the guidingportions of the members being located entirely above the base portionsthereof whereby a flat lower face is presented directly beneath saidbase portions so that the device may be applied fiatwise to its work,one of said base portions being superimposed flatwise upon the other andhaving a sliding movement thereon, that one of said base portions thatis stationary being supported at opposite ends of the sliding baseportion whereby a firm support is provided for the latter and means tosecure said base portions in proper relation.

6. A guide for a boring tool comprising a support adapted to be appliedflatwise to the Work and having a passage therein for the tool, a lowerbase portion applied flatwise to the support and thereby sustainedthroughout its longitudinal extent, an upper base portion appliedfiatwise to the lower base'portion, both of said base portions beingwithin the contour of the support, whereby a stable balanced guide ispresented, and upright guiding members rising from said base members andadapted to receive and embrace between them the boring portion of thetool, whereby the boring portion of the tool is supported and guided inproximity to its Work and means to secure said base portions in properrelation.

7. A guide for a boring tool comprising a support adapted to be appliedfiatwise to the work and having a passage therein for the tool, a lowerbase portion applied fiatwise to the supportand thereby sustainedthroughout its longitudinal extent, an upper base portion appliedflatwise to the lower base portion, both of said base portions beingwithin the contour of the support, whereby a stable balanced guide ispresented, and upright guiding members rising from said base members andadapted to receive and embrace between them the boring portion of thetool whereby the boring portion of the tool is supported and guided inproximity to its work, the upper of said base portions having a slidingmovement upon the fixed-base portion whereby tools of diiferent sizesmay be suitably guided and means to secure said base portions in properrelation.

8. A guide for a boring tool comprising a support adapted to have itslower face applied to the work and having a passage therein for theboring tool, a plurality of guiding members adapted to receive andembrace between them the boring portion of the tool, each of saidmembers having an extended vertical guiding surface partiallyencompassing the tool to be guided, a base portion for each of saidguiding members disposed substantially normal to said guiding members,said guiding members rising from the flat upper face of said support andsaid base portions being sustained flatwise upon said support from endto end thereof and means to secure said base portions in properrelation.

9. A guide for a-boring tool comprising a support adapted to be appliedfiatwise to the work and having a passage therein for the tool, a lowerbase portion applied fiatwise to the support and secured thereto alongits longitudinal extent, said base portion having an opening therein'ofre duced extent, a second base portion supported upon the first baseportion and extending to the opening therein, said second base portionbeing thereby firmly supported by the first base portion and the supportbeneath the same, each base portion having a guiding member for theboring portion of the tool rising therefrom, the said boring portion ofthe tool being thereby sustained and guided close to its Work and meansto secure said base portion in proper relation.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

HENRY FORREST LIBBY.

Witnesses:

ARTHUR A. LIBBY, ANNA B. FITZ.

